Liquid-droplet jetting apparatus and liquid transporting apparatus
a technology of liquid droplets and jetting apparatus, which is applied in the direction of printing, etc., can solve the problems of reducing the reliability of electrical connection between the piezoelectric actuator and the fpc, the shape of the ink channel becomes complicated, and the fpc cannot be pressed sufficiently against the contact points, etc., to achieve the effect of reducing manufacturing costs, simplifying the shape of the liquid channel, and rigidity of the area of the piezoelectric actuator
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first modified embodiment
[0073]In the embodiment, the structure is such that for one pressure chamber 14, the ink flows in from one communicating channel 23, (see FIG. 3). However, a structure may be adopted such that the ink flows into one pressure chamber from two communicating channels. For example, as shown in FIG. 8, a plurality of contact points 35A are drawn, on the upper surface of the piezoelectric layer 31, from a plurality of individual electrodes 32A respectively, up to an area facing the manifold 17 along a center line extending in the scanning direction (left and right direction in FIG. 8) of the individual electrodes 32A. On the other hand, a plurality of supporting sections 25A are formed in a cavity plate, such that the supporting sections 25A are extend from partition walls 22A, respectively, separating the pressure chambers 14 and the manifold 17, and to project up to positions each facing one of the contact points 35A. Further, two communicating channels 23A are formed on two sides, resp...
second modified embodiment
[0074]It is not necessarily indispensable that the communicating channels communicating the pressure chambers and the manifold are formed in the cavity plate in which the pressure chambers and the supporting sections are formed, and the communicating channels may be formed in a plate other than the cavity plate. For example, as shown in FIG. 9, a communicating channel 23B may be formed on an upper surface of a manifold plate 11B which is in contact with a lower surface of a cavity plate 10B (surface on a side opposite to the piezoelectric actuator 3). Thus, when the communicating channel 23B is formed on the plate 11B which is a different plate from the cavity plate 10B on which the supporting section 25 is formed, a position of the communicating channel 23B is not constrained by the supporting section 25. Therefore, as in FIG. 9, the degree of freedom of designing becomes higher such that, for example, it is possible to arrange the communicating channel 23B below the supporting sec...
third modified embodiment
[0075]It is not necessarily indispensable that the vibration plate 30 serves also as the common electrode as in the piezoelectric actuator 3 of the above-described embodiment. As shown in FIG. 10, a common electrode 34 and the vibration plate 30 may be provided separately. When the vibration plate 30 is a metallic plate, however, the vibration plate 30 and the common electrode 34 are required to be insulated by an insulating layer made of a ceramics material, a synthetic resin material, or the like. On the other hand, when the vibration plate 30 is made of an insulating material, the common electrode 34 is formed directly on the upper surface of the vibration plate 30.
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